The following is a list of butterflies recorded at Brent Reservoir (awaiting update)
- Grizzled Skipper Pyrgus malvae
One record (undated) - Essex Skipper Thymelicus lineola
Breeding - Small Skipper Thymelicus sylvestris
Breeding - Large Skipper Ochlodes sylvanus
Breeding - Orange-tip Anthocharis cardamines
Breeding - Large White Pieris brassicae
Breeding - Small White Pieris rapae
Breeding - Green-veined White Pieris napi
Breeding - Clouded Yellow Colias croceus
Occasional migrant: four in the 1990s, regular in autumn 2000 - Brimstone Gonepteryx rhamni
Annual, in increasing numbers, probably breeding - Wall Lasiommata megera
Bred until 1980s, now locally extinct - Speckled Wood Pararge aegeria
Breeding - Small Heath Coenonympha pamphilus
Has recently become extinct locally - Ringlet Aphantopus hyperantus
Recorded for the first time in 2009 and now established - Meadow Brown Maniola jurtina
Breeding - Gatekeeper Pyronia tithonus
Breeding and increasing - Marbled White Melanargia galathea
Now breeding following first record on 18 July 1999 - Dark Green Fritillary Argynnis aglaja
One on 18 July 1999 - Red Admiral Vanessa atalanta
Regular migrant, probably breeding - Painted Lady Vanessa cardui
Regular migrant, breeding - Peacock Aglais io
Breeding - Small Tortoiseshell Aglais urticae
Breeding - Camberwell Beauty Nymphalis antiopa
One on 23 April 1940 - Comma Polygonia c-album
Breeding - Marsh Fritillary Euphydryas aurinia
Bred in 1700, now locally extinct - Small Copper Lycaena phlaeas
Breeding - Purple Hairstreak Favonius quercus
Breeding - White-letter Hairstreak Satyrium w-album
First seen on 20 July 1995 and now established in small numbers - Holly Blue Celastrina argiolus
Breeding - Brown Argus Aricia agestis
After a single record on 9 August 2015, seen again more than once in 2018 - Common Blue Polyommatus icarus
Breeding
References
Beddard R., Colmans J., Dobson J., Verrall A. (2002) “Butterflies”, in Birds of Brent Reservoir: The Natural History of the Welsh Harp (eds L. Batten, R. Beddard, J. Colmans, A. Self). London: Welsh Harp Conservation Group.
